Board Thread:Pokémon Help/@comment-31398341-20171026040947/@comment-31398341-20171213141510

Also, for Mega Aerodactyl, you mentioned about its ability. While it is true that M-Aero's ability is not always useful, a Pokemon does not always need a good ability to be a good Pokemon. Take Deoxys, Keldeo, Mew and Weavile for instance. M-Aero's ability is also actually used since Aerial Ace, its best flying STAB, is boosted by Tough Claws.

Mega Aerodactyl is a good Pokemon by itself already. As I said before, it beats many of meta Pokemon and has a near-unbeatable speed, even some +1 Pokemon cannot outspeed it. The real downside of M-Aero is underwhelming damage output, but that does not prevent it from being a good revenge killer.